verified Waec 2017 Computer obj and theory answers

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  Comp Obj

  1-10ACDCBDDCAB

  11-20BADDCBBCDB

  21-30ABBDABCBCB

  31-40BCBAACCCBA

  41-50DBDDCBCCDB

  
  

  
  

  
  

  
  

  Theory answers 

  
  

  

  
  

  

  
  1a) An input device is any hardware device that
  sends data to a computer, allowing you to
  interact with and control the computer. The
  picture shows a Logitech trackball mouse, an
  example of an input device.
  .
  1b i)  key board
       ii)  The mouse
  .
  1c) i) Logic gates are digital components that
  typically work two levels of voltage and
  determine how a component conducts
  electricity.
  .
  ii) Logic gates use Boolean
  equations and switch tables.
  .
  1d)
  

  

  
  
  
  (3a)
  information is an analyzed or processed data, which is now
  more meaningful and decisions can be made based on its
  data and information is connected.
  .
  Communication technology is the activity of designing,
  constructing and maintaining communication systems. In
  the modern era it is referred to as ICT. This is information
  and communications technology, and includes any
  communication device or application such as radio and
  television.
  .
  (3b)
  LAN-local area network
  GPS-global postioning Service.
  IP-internet protocol
  .
   (3b)
  LAN-local area network
  GPS-global postioning Service.
  IP-internet protocol
  ============
  .
  
  4a)
  complet the table
  1)RAM is volatile i.e. its contents are
  lost when the ddevice is powered
  off.
  
  ROM is non-volatile i.e. its contents
  are retained even when the device is
  powered off.
  
  2)RAM allows the computer to read
  data quickly to run applications. It
  allows reading and writing.
  
  ROM stores the program required to
  initially boot the computer. It only
  allows reading.
  =========================
  .4b)
  i)Searching and Organizing
  ii)Ease of Access Center
  iii)Default Programs
  iv)Remote Desktop Connection
  4c)
  i)antivirus programs
  ii)registry cleaners
  (4b)ii.
  +Password-protect
  +documents encryption
  +Secure wireless transmissions
  
  
  5a)
  10110112
  =1*2^6+0*2^5+1*2^4+1*2^3+0*2^2+1*2^1+1*2^0
  =1*64+0*32+1*16+1*8+0*4+1*2+1*1
  =64+0+16+8+0+2+1
  =91
  tabulate
  16|91
  5 r B
  O r 5
  10110112=5B16
  were B is  11
  5b)
  HACKER
  i) A hack group getting main owner on an XAT chat without authorization.
  SCAMMER
  ii)Tricking an internet user into giving you his/her login name and password
  5c)
  i)HTML:Hypertext Markup Language
  ii)HTTP: Hypertext Transfer Protocol
  iii)ISP: Internet Service Language
  iv)SMTP: Simple Mail Transfer Protocol.
  Typing.......
  
  
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• doktoh bash: Wednesday, 12 April 2017 at April 12, 2017 (edit)
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